As for my pictures of the Northrop N-1M Flying Wing at the Udvar-Hazy facility taken during the 447th BG reunion in 2015, each was captured as a by-product of photographing one of the larger planes displayed next to it so it is partially obscured or drastically cropped. I cannot find any photos where the N-1M is the central subject. I guess I’ll just have to go back someday!
I did photograph the very similar Northrop N-9M Flying Wing at the Planes of Fame Museum in Chino, but that example was destroyed in April 2019.